<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区 -->
      <el-menu
      :default-active="activePath"
      :collapse-transition="false"
      :collapse="isCollapse"
      background-color="burlywood"
      text-color="#fff"
      active-text-color="teal"
      :unique-opened="true"
      :router="true">
      <!-- 一级菜单 -->
      <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
        <!-- 一级菜单的模板区域 -->
        <template slot="title">
          <!-- 图标 -->
          <i :class="iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
        <el-menu-item :index="'/' + subItem.path + ''" v-for="subItem in item.children" :key="subItem.id"
        @click="saveNavState('/' + subItem.path)">
          <template slot="title">
          <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{subItem.authName}}</span>
        </template>
        </el-menu-item>
      </el-submenu>
    </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menulist: [],
      iconsObj: {
        125: 'iconfont el-icon-user',
        103: 'iconfont el-icon-setting',
        101: 'iconfont el-icon-goods',
        102: 'iconfont el-icon-document',
        145: 'iconfont el-icon-s-check'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.menulist = res.data
      console.log(res)
    },
    // 点击按钮，切换菜单的折叠
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
  .home-container {
    height: 100%;
  }
  .el-header {
    background-color: teal;
    display: flex;
    justify-content: space-between;
    padding-left: 20px;
    align-items: center;
    color: #ffffff;
    font-size: 20px;
    > div {
      display: flex;
      align-items: center;
      span {
      margin-left: 15px;
    }
    }
  }
  .el-aside {
    background-color:teal;
    color: #ffffff;
    .el-menu {
      border-right: none;
    }
  }
  .el-main {
    background-color: #5f5f5f40;
  }
  .iconfont {
    margin-right: 10px;
  }
  .toggle-button {
    // background-color:cadetblue;
    color: burlywood;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2px;
    cursor: pointer;
  }
</style>
